On the definition of subspecies, and issues of taxonomy
Generally, we are assessing indicators at the species level. However, there are frequent revisions of taxonomy (lumping and splitting of species) and some species groups are better studied and thus more finely examined than others. Consequently, what may be considered a subspecies by some experts, may be considered a species by others. In such situations, assessors may include subspecies if the entity is an important unit for that country (e.g., it has separate reports or protection or Red List status.